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E = (C_f / C_s) * (t / t_0)

Coffee extraction is the process by which coffee solids and oils are extracted from the coffee beans. The extraction process is affected by a range of factors, including the particle size and distribution of the coffee grounds, the brewing time, and the water temperature.

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where Q is the heat transfer rate, h is the convective heat transfer coefficient, A is the surface area, T_s is the surface temperature, and T_f is the fluid temperature.

Q = -K * A * (ΔP / L)

The extraction process can be described by the following equation:

where E is the extraction efficiency, C_f is the concentration of coffee solids in the fluid, C_s is the concentration of coffee solids in the coffee beans, t is the brewing time, and t_0 is the characteristic time for extraction. E = (C_f / C_s) * (t /

Q = h * A * (T_s - T_f)